Disc brakes

Abstract

A disc brake caliper consists of a body member including a cylinder portion, and a bridge member attached to the body member by two bolts. The body and bridge members of the caliper abut one another at two pairs of parting faces lying in a common plane, aligned bolt holes for the two bolts being formed in the parting faces. The cylinder portion of the body member extends axially beyond the parting plane so that a recessed portion of the bridge member overlies but is spaced from the cylinder portion to form an air pocket which is adequately vented. The two parting faces on the body member can be machined simultaneously by means of two broaching tools which clear the cylinder portion.

We claim: 
     
       1. A disc brake caliper which comprises a body member, a bridge member and means securing said members together along a parting plane, said body member having two separate co-planar parting faces in said parting plane with respective bolt holes therein and having a cylinder portion which projects forwardly beyond said parting plane, and said bridge member having two complementary parting faces with respective bolt holes therein aligned with said bolt holes in said body member and having a recessed portion between the last-mentioned parting faces and overlying but spaced from said forwardly projecting cylinder portion of said body member, said securing means comprising two bolts passing respectively through said aligned bolt holes. 
     
     
       2. A disc brake caliper according to claim 1 in which said bridge member consists of a casting and said recessed portion of said bridge member is a portion formed thereon as cast. 
     
     
       3. A disc brake caliper according to claim 1 further comprising a fixed support and means for axially slidably mounting said body member on said support, said mounting means including a pair of axially directed pins. 
     
     
       4. A disc brake caliper according to claim 3 in which said body member has a pair of axially directed holes respectively in said two parting faces thereof, each of said pins being received in a respective one of the last-mentioned pair of holes. 
     
     
       5. A disc brake caliper according to claim 4 in which said pins are secured in said respective holes in said body member and said fixed support has a pair of axially directed bores therein in which said pins are slidably received. 
     
     
       6. A disc brake caliper according to claim 1 in which said bridge member has a relatively small pad inspection aperture therein.